why do you think that good memory is important in learning English?

Because in order to master a language ,you have to learn many words and phrases by heart so that you can open your mouth and speak it out.In other words,the process of learning English is the process of storing information about this language.Memory is just like the container with which you store information about English.So the better memory you get and the more words and phrases you store, the better your English will be.

first,to grasp english one is obliged to have a large amount of vocabulary ,to wich a good memory is indispensable .secondly,good memory does good for one to grasp diverse slangs.finally,good memory can save one's time of reviewing .